Tip for oxy-acetylene torches



Nov. 22, 1932. A. F. JENKINS TIP FOR OXY-ACETYLENE TORGHES Filed April4, 1931 ln/manto@ dummy PatentedI Nov. 22, ,1932

PATENT oFFllcE' ALEXANDER IF. JENKINS, 0F BALTIMORE, MARYLAND TIP FOROXY-ACETYLENE TORCHES Application led April 4, 1931. Serial No. 527,789.

The present invention relates to cutting torches and particularly totips for such torches.

Various types of cutting torches have heretofore been designed orsuggested. Generally, for cutting purposes, a tip is used which isprovided with a central passage for oxygen and one or more laterallydisposed passages for combustible gases. The combustible gases issuingfrom the discharge ports of the tip are ignited, and the flamesresulting from the ignition of these gases constitute heating flameswhereby a piece of steel or other metal may be raised to suchtemperature that the oxygen issuing from the central jet can combinetherewith to rapidly oxidize the heated metal, quickly burning it away.Usually also the issuing jet of-oxygen is of relatively small crosssection and under relatively high pressure, so that the cut made by theaction of the torch is relatively narrow. Y

It has also been proposed that, 'where itis desired to'cut or burn awaycom aratively large areas ofv metal, it is desira le to 1ncrease thearea of the passageway provided for conducting'the cutting oxygen to thedischarge end of the tip and to restrict this passage .at its rear endso that the issuing jet of oxygen is of relatively low velocity. Y

- The present invention relates to the class of cutting or burning tipslast mentioned but differs widely in structure from tho/seheretoforedesigned or suggested. Thus, instead of restricting the passage for thecutting oxygen at its rear end, it is made relatively large at its rearend and restricted at its forward end, that is, adjacent the oxygendischarge port.

The inventin also contemplates a novel form ofA ort for dischargingthe.oxygen against4 t Ve work. 0 The voxygen dischargeport contalns adevlce or member preferably ormed separately from the tip and insertedin the forward end of the oxygen passage Preferablyalso I considerablesize may be burned rapidly u through metallic members, rivet heads re`moved by burning, and other similar operations performed with speed andfacility. Furthermore, in performing such operations as piercing plates,removing rivets, etc., va. minimum quantity of oxygen is used inproportion to the mass of metal burned away.v

The invention may have various embodiments, and in the accompanyingdrawing two such embodiments are illustrated. It will be p appreciated,however, that the forms'illustrated and hereinafter described in detailare, set forth by way of example only.

In the drawing: Figure 1 is a on' the novel torch tip; A v

Figure 2 is an end view thereof; Figure 3 is a section on line 3-3 of.Figure 1; l i

Figure 4 is a sli htly modified or'm of tip;

igure.I 5V is a longitudinal Aaxial section through the discharge end ofalgmodified form Figure 6 is a section on line 6 6 of Figure 5.

The tip bodyn is indicated at 10,4 and this body comprises the usualcustomary cylindrical, or nearly cylindrical, portion 10 and 4of tip;and

gitudinal section through v partial section throughs.

the enlarged portion 102, by means of which j` it may be readily clamtorch bythe usual coup ing customarily em-` ployed for this purpose.Passing axially ed to athehead of athrough the tip is the cylindricaloxygen assage 11. This passage 11 is relatively arge in cross section as-eompared with the oxygen passages in the customary and usual tipprimarily intended for cut-ting relatively narrow slots in metallicmembers.

As will be clearly seen romFigure 1 ol the drawing, a member 12, in thenature of an oxygen jet shaping or defining member, is positioned in thepassageway 11 adjacent the discharge end. Membery 12 comprises a forwardcylindrical portion 12 the diameter of which is somewhat less than the-diameter of oxygen passage 11 at that point, together with a portion122, by means of which it is supported axially in passageway 11, leavingan annular channel for the passage of oxygen between the concentriccylindrical V-wallsjof member 12 and passage 11.

Portion 122V of member 12 is formed generall as a cylinder, the outsidediameter of whic is equal to the inside diameter of passage 11. Thiscylindrical portion 122 of meinber 12 is preferably formed integral withcylindrical portion 12 and is'exteriorly and longitudinally grooved at aplurality ofV points. YIn the drawing member 122 isV shown to have 'sixlongitudinal grooves 123 formed therein. These grooves serve to conductoxygen past the portion 122 of member 12 and to discharge it into theannular space Y between portion'12 thereofV and the wall of passageway11. VYThe cylindrical surfaces of member 12 iit tightly against thecylindrical' wall of passageway 11, and the member is thereby retainedtriction'ally inthe position in which it is shown in the drawing.

A plurality ofcrelatively small conduits 13 extend through thetip fromone end to the otliei', these conduits being Vadapted toV convey heatinggases, and the discharge ends of the conduits being disposedequidistantly from the axis of the tip and the axis of the cylindricalmember 12. As I preferably forni the combustible mixture in the tipitself, these passages are intersected adjacent their rea-r ends bybranch passages 14. -Both the straight passages 13 and branch passages14. terminate ingrooves, indicated at 15 and 16 respectively, thesegrooves being concentric and cut in the seating surface 17 of the tip,which surface is adapted to be seated firmly against a similar surfaceofthe head ot the torch. A port in the head of the torch delivers oxygento the groove 15, and a second port in register with groove 16 deliversacetylene, hydrogenfor other combustible as. These gases arebrought-together at the ]unction of ducts 13 and 14 and are causedY tointermingle in their passage toward the discharge ports of ducts 13.

As shown in Figure 4t, l may provide a modiiied form of restrictingmember, such as is indicated at 12a, this member having a central oxygenduct 18 whereby relatively small jet of oxygen ma be discharged axiallyfrom the torch in a dition to the annular stream of outtlowing gas.Additional ports such as 18 may be provided if desired. The tipdescribed is very effective in operation, enabling the operator to cutclean circular holes in a body of metal with minimum expenditure ofoxygen. .Y

In the form of tip illustrated in Figures For special purposes thedesign and ar-I rangement of the several elements of the invention maybe modied in other respects without departure from the principlesthereof.

Having thus described the invention, what is claimed as new and desiredto be secured by Letters Patent is 2- 1. A-tip for a torch havingpassages for heating gases and a passage for oxygen, the discharge portfor the oxygen passage being substantially annular whereby a stream ofoxygen of annular cross section is discharged therefrom, the heatinggases being discharged exteriorly of the annular oxygen stream.

2. A tip for a torch having a'plurality of heating gas passages `withdischarge ports equidistantly spaced from a common center and a passagefor oxygen having an annular discharge port concentric with said center,the heating gas ports being located without the oxygen discharge port.

3. A tip for a torch having passages for heating gases, a passage foroxygen, the oxygen passage being relatively large and of substantiallythe same cross section throughout, and amember supported centrally insaid oxygen passage adjacent theY discharge end thereof whereby theescaping oxygen is caused to be discharged from the tip in a hollowstreamfthe wall of said restricting device being spaced rom the wall ofthe passage, said walls therefore defining between them an annularoxygen discharge port.

4. A tip fora torch having passages for heating gases, a passage foroxygen in the form 'of an elongated cylindrical conduit oi relativelylarge cross section, the rear end of said passage being unrestricted,and a cylindrical member positionedconcentrically in said passageadjacent the discharge end thereof, the cylindrical wall ct said memberbeing spaced from the cylindrical wallY of the passage, and said memberhaving means engaging the Wall of said passage to retain the same insuch position.

5. A tip for a torch having lateral passages for heating gases and acentral passage for oxygen, said oxygen passage being relatively largein cross section and having a gas flow restricting device positionedcentrally therein adjacent the discharge port, the wall of saidrestricting device being spaced from the wall of the passage, said wallstherefore deining between them an annular oxygen discharge port.

In testimony whereof I hereunto aiiix my signature.

' ALEXANDER F. JENKINS.

